Player Page

Roos, B (Benjamin)
Dob: 2016/04/27 (U10)
Gender: Male
Chess SA id: 1160148677
FIDE id:
Region: Tshwane (GTP)
Citizen: RSA
Title(s):
Last active: 2024/09/01 (7 days ago)
Ratings
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1415.0
Current Weighted rating1311.1
Current Weighted performance1449.9
Current official/published rating (highest between Raw, WR and WP)1449.9
Current highest rating achieved1415.0
Current floor (min rating allowed)915.0
Current K-factor32
Games played this month6
Score (S)2.5
Expected score (We)3.90
Difference (S-We)-1.32
Current Raw change (no limits, including tournament time weight)-42.1
Current min/max change allowed (with limits)±122.1
Current Raw change used (final)-42.1
Projected new Raw rating1372.9
Projected new Weighed rating1209.1
Projected new Weighted performance1404.2
Projected new final Raw rating (if new WP > new Raw)1404.2
Projected new highest rating1415.0
Projected new floor915.0
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1404.2
Projected effective change (new Official - current Official)-45.7
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1410.6
Current Weighted rating1312.4
Current Weighted performance1449.9
Current official/published rating (highest between Raw, WR and WP)1449.9
Current highest rating achieved1410.6
Current floor (min rating allowed)910.6
Current K-factor32
Games played this month6
Score (S)2.5
Expected score (We)3.90
Difference (S-We)-1.40
Current Raw change (no limits, including tournament time weight)-44.8
Current min/max change allowed (with limits)±122.8
Current Raw change used (final)-44.8
Projected new Raw rating1365.8
Projected new Weighed rating1210.2
Projected new Weighted performance1404.2
Projected new final Raw rating (if new WP > new Raw)1404.2
Projected new highest rating1410.6
Projected new floor910.6
Projected new K-facor32
Projected new official/published rating (highest between new Raw, new WR and new WP)1404.2
Projected effective change (new Official - current Official)-45.7
s
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
Current K-factor36
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±165.8
Current Raw change used (final)0.0
Projected new Raw rating1200.0
Projected new Weighed rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1200.0
Projected effective change (new Official - current Official)=0.0
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
Current K-factor36
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±165.8
Current Raw change used (final)0.0
Projected new Raw rating1200.0
Projected new Weighed rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1200.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: 2024 Etienne Lewis (U10)
Start: 2024/08/30  End: 2024/09/01  Host: GTP  Type: Standard   Time: 90  Time weight: 0.94  Rounds: 6
Games: 6  Score: 2.5
Main rating: 1453.5  Rating gain/loss: -42.1
Type rating: 1449.5  Rating gain/loss: -44.8
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
7 2024 Etienne Lewis (U10) 2024/08/30 2024/09/01 Tshwane (GTP) Standard 90 0.94 7 6 2.5 1453.5 1449.5 Analysis
6 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U9A) 2024/08/03 2024/08/03 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1415.0 1410.6 Analysis
5 2024 Elise Steenkamp Open Chess Tournament (Bishops) 2024/06/15 2024/06/15 Tshwane (GTP) Standard 90 0.94 5 5 4.5 1326.9 1329.4 Analysis
4 2024 KSNG CHess Academy Open Tournament (E) 2024/04/06 2024/04/06 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1306.6 1304.9 Analysis
3 2024 Tshwane Chess AHS Open Chess Tournament (E) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1306.6 1307.4 Analysis
2 2024 Tshwane Chess OPEN Registration Tournament (E) 2024/01/27 2024/01/27 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1281.8 1284.4 Analysis
1 2024 Gauteng Inter-Region Chess Championship (U8) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1281.8 1284.4 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
12 2024 Etienne Lewis (U10) 2024/08/30 2024/09/01 Tshwane (GTP) Standard 90 0.94 7 6 2.5 1453.5 1449.5 Analysis
11 D4 Tshwane South District Schools Teams Chess Tournament 2024 (U9A) 2024/08/03 2024/08/03 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1415.0 1410.6 Analysis
10 2024 Elise Steenkamp Open Chess Tournament (Bishops) 2024/06/15 2024/06/15 Tshwane (GTP) Standard 90 0.94 5 5 4.5 1326.9 1329.4 Analysis
9 2024 KSNG CHess Academy Open Tournament (E) 2024/04/06 2024/04/06 Tshwane (GTP) Standard 60 0.83 5 5 4.0 1306.6 1304.9 Analysis
8 2024 Tshwane Chess AHS Open Chess Tournament (E) 2024/02/24 2024/02/24 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1306.6 1307.4 Analysis
7 2024 Tshwane Chess OPEN Registration Tournament (E) 2024/01/27 2024/01/27 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1281.8 1284.4 Analysis
6 2024 Gauteng Inter-Region Chess Championship (U8) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1281.8 1284.4 Analysis
5 Lardies Open Tournament 2023 (F) 2023/10/28 2023/10/28 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1267.6 1276.5 Analysis
4 2023 Etienne Lewis Closed Tournament (U8) 2023/08/26 2023/08/26 Tshwane (GTP) Standard 90 0.94 6 6 4.0 1235.1 1243.0 Analysis
3 2023 Lubowski Open Tournament (F) 2023/06/24 2023/06/24 Tshwane (GTP) Standard 90 0.94 5 5 2.5 1241.9 1251.6 Analysis
2 Tuks Junior Developmental Chess Tournament 2023 (Green) 2023/03/18 2023/03/18 Tshwane (GTP) Standard 60 0.83 5 5 4.5 1165.5 1157.2 Analysis
1 2023 Tshwane Chess Open Registration Tournament (F) 2023/01/28 2023/01/28 Tshwane (GTP) Standard 60 0.83 5 5 1.5 1200.0 1200.0 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 36 23 3 10 24.5 68.1 153.5 1249.5 1403.0
White 18 13 1 4 13.5 75.0 212.5 1243.6 1456.1
Black 18 10 2 6 11.0 61.1 94.4 1255.5 1349.9
Standard All 36 23 3 10 24.5 68.1 153.5 1249.5 1403.0
White 18 13 1 4 13.5 75.0 212.5 1243.6 1456.1
Black 18 10 2 6 11.0 61.1 94.4 1255.5 1349.9
Rapid All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 62 37 6 19 40.0 64.5 123.4 1235.5 1358.9
White 30 19 2 9 20.0 66.7 141.7 1231.5 1373.1
Black 32 18 4 10 20.0 62.5 106.3 1239.3 1345.5
Standard All 62 37 6 19 40.0 64.5 123.4 1235.5 1358.9
White 30 19 2 9 20.0 66.7 141.7 1231.5 1373.1
Black 32 18 4 10 20.0 62.5 106.3 1239.3 1345.5
Rapid All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 1160157441 Swart, E (Eben) 3 3.0 3 0 0 100.0 1276.5 425.0 1701.5 View list
2 2160158380 Grobbelaar, M (Mari) 3 1.5 1 1 1 50.0 1261.5 0.0 1261.5 View list
3 1160147672 Rocher, G (Gideon) 3 1.0 1 0 2 33.3 1278.8 -141.7 1137.1 View list
4 1160148081 Wiehahn, L (Luke) 3 0.0 0 0 3 0.0 1331.7 -425.0 906.7 View list
5 1150190422 Li, J (Jiming) 2 2.0 2 0 0 100.0 1341.3 425.0 1766.3 View list
6 2160157440 Moggee, E (Emily) 2 2.0 2 0 0 100.0 1261.8 425.0 1686.8 View list
7 2160162781 Westermann, Z (Zelri) 2 2.0 2 0 0 100.0 1316.8 425.0 1741.8 View list
8 1160190423 Zhang, Y (Yufeng) 2 2.0 2 0 0 100.0 1380.0 425.0 1805.0 View list
9 1160157439 Lekalakala, T (Tshimologo) 2 1.0 1 0 1 50.0 1238.5 0.0 1238.5 View list
10 1160151829 Erdogan, D (Demir) 2 1.0 0 2 0 50.0 1203.7 0.0 1203.7 View list
11 1170157329 Roberts, MH (Marthinus Hendrik) 1 1.0 1 0 1 100.0 1415.0 425.0 1840.0 View list
12 1160152254 Hugo, V (Victor) 1 1.0 1 0 0 100.0 1165.5 425.0 1590.5 View list
13 2150143025 Haupt, N (Nia) 1 1.0 1 0 0 100.0 1306.6 425.0 1731.6 View list
14 1160154139 Haupt, D (Dawid) 1 1.0 1 0 0 100.0 1241.9 425.0 1666.9 View list
15 1150152739 Jansen Van Vuuren, G (Griffin) 1 1.0 1 0 0 100.0 1306.6 425.0 1731.6 View list
16 1160147138 Gresse, J (Jayden) 1 1.0 1 0 0 100.0 1281.8 425.0 1706.8 View list
17 1160153451 Fredericks, M (Matai) 1 1.0 1 0 0 100.0 1235.1 425.0 1660.1 View list
18 1150136650 Coetzee, R (Riko) 1 1.0 1 0 0 100.0 1281.8 425.0 1706.8 View list
19 1160153976 Benjamin, L (Liyabona) 1 1.0 1 0 0 100.0 1281.8 425.0 1706.8 View list
20 1160152256 Luyt, E (Erzick) 1 1.0 1 0 0 100.0 1165.5 425.0 1590.5 View list